Résumé: Digital music scores are a way to present music notation and lack of semantic information useful for musicology purposes in order to manipulate music concepts. We propose a general approach to extend score encodings with semantic annotations. It relies on an ontology of music notation designed to integrate semantic music elements either extracted or produced by a knowledge process. We illustrate the whole mechanism by extracting RDF facts based on the identi cation of dissonances in Renaissance counterpoint.